require 'active_support/core_ext/hash/except' require 'active_support/core_ext/hash/reverse_merge' require 'active_support/core_ext/hash/slice' require 'active_support/core_ext/enumerable' require 'active_support/core_ext/array/extract_options' require 'active_support/core_ext/module/remove_method' require 'active_support/inflector' require 'active_support/deprecation' require 'action_dispatch/routing/redirection' require 'action_dispatch/routing/endpoint' module ActionDispatch module Routing class Mapper URL_OPTIONS = [:protocol, :subdomain, :domain, :host, :port] class Constraints < Endpoint #:nodoc: attr_reader :app, :constraints SERVE = ->(app, req) { app.serve req } CALL = ->(app, req) { app.call req.env } def initialize(app, constraints, strategy) # Unwrap Constraints objects. I don't actually think it's possible # to pass a Constraints object to this constructor, but there were # multiple places that kept testing children of this object. I # *think* they were just being defensive, but I have no idea. if app.is_a?(self.class) constraints += app.constraints app = app.app end @strategy = strategy @app, @constraints, = app, constraints end def dispatcher?; @strategy == SERVE; end def matches?(req) @constraints.all? do |constraint| (constraint.respond_to?(:matches?) && constraint.matches?(req)) || (constraint.respond_to?(:call) && constraint.call(*constraint_args(constraint, req))) end end def serve(req) return [ 404, {'X-Cascade' => 'pass'}, [] ] unless matches?(req) @strategy.call @app, req end private def constraint_args(constraint, request) constraint.arity == 1 ? [request] : [request.path_parameters, request] end end class Mapping #:nodoc: ANCHOR_CHARACTERS_REGEX = %r{\A(\\A|\^)|(\\Z|\\z|\$)\Z} attr_reader :requirements, :defaults attr_reader :to, :default_controller, :default_action attr_reader :required_defaults, :ast def self.build(scope, set, ast, controller, default_action, to, via, formatted, options_constraints, anchor, options) options = scope[:options].merge(options) if scope[:options] defaults = (scope[:defaults] || {}).dup scope_constraints = scope[:constraints] || {} new set, ast, defaults, controller, default_action, scope[:module], to, formatted, scope_constraints, scope[:blocks] || [], via, options_constraints, anchor, options end def self.check_via(via) if via.empty? msg = "You should not use the `match` method in your router without specifying an HTTP method.\n" \ "If you want to expose your action to both GET and POST, add `via: [:get, :post]` option.\n" \ "If you want to expose your action to GET, use `get` in the router:\n" \ " Instead of: match \"controller#action\"\n" \ " Do: get \"controller#action\"" raise ArgumentError, msg end via end def self.normalize_path(path, format) path = Mapper.normalize_path(path) if format == true "#{path}.:format" elsif optional_format?(path, format) "#{path}(.:format)" else path end end def self.optional_format?(path, format) format != false && !path.include?(':format') && !path.end_with?('/') end def initialize(set, ast, defaults, controller, default_action, modyoule, to, formatted, scope_constraints, blocks, via, options_constraints, anchor, options) @defaults = defaults @set = set @to = to @default_controller = controller @default_action = default_action @ast = ast @anchor = anchor @via = via path_params = ast.find_all(&:symbol?).map(&:to_sym) options = add_wildcard_options(options, formatted, ast) options = normalize_options!(options, path_params, modyoule) split_options = constraints(options, path_params) constraints = scope_constraints.merge Hash[split_options[:constraints] || []] if options_constraints.is_a?(Hash) @defaults = Hash[options_constraints.find_all { |key, default| URL_OPTIONS.include?(key) && (String === default || Fixnum === default) }].merge @defaults @blocks = blocks constraints.merge! options_constraints else @blocks = blocks(options_constraints) end requirements, conditions = split_constraints path_params, constraints verify_regexp_requirements requirements.map(&:last).grep(Regexp) formats = normalize_format(formatted) @requirements = formats[:requirements].merge Hash[requirements] @conditions = Hash[conditions] @defaults = formats[:defaults].merge(@defaults).merge(normalize_defaults(options)) @required_defaults = (split_options[:required_defaults] || []).map(&:first) end def make_route(name, precedence) route = Journey::Route.new(name, application, path, conditions, required_defaults, defaults, request_method, precedence) route end def application app(@blocks) end def path build_path @ast, requirements, @anchor end def conditions build_conditions @conditions, @set.request_class end def build_conditions(current_conditions, request_class) conditions = current_conditions.dup conditions.keep_if do |k, _| request_class.public_method_defined?(k) end end private :build_conditions def request_method @via.map { |x| Journey::Route.verb_matcher(x) } end private :request_method JOINED_SEPARATORS = SEPARATORS.join # :nodoc: def build_path(ast, requirements, anchor) pattern = Journey::Path::Pattern.new(ast, requirements, JOINED_SEPARATORS, anchor) # Get all the symbol nodes followed by literals that are not the # dummy node. symbols = ast.find_all { |n| n.cat? && n.left.symbol? && n.right.cat? && n.right.left.literal? }.map(&:left) # Get all the symbol nodes preceded by literals. symbols.concat ast.find_all { |n| n.cat? && n.left.literal? && n.right.cat? && n.right.left.symbol? }.map { |n| n.right.left } symbols.each { |x| x.regexp = /(?:#{Regexp.union(x.regexp, '-')})+/ } pattern end private :build_path private def add_wildcard_options(options, formatted, path_ast) # Add a constraint for wildcard route to make it non-greedy and match the # optional format part of the route by default if formatted != false path_ast.grep(Journey::Nodes::Star).each_with_object({}) { |node, hash| hash[node.name.to_sym] ||= /.+?/ }.merge options else options end end def normalize_options!(options, path_params, modyoule) if path_params.include?(:controller) raise ArgumentError, ":controller segment is not allowed within a namespace block" if modyoule # Add a default constraint for :controller path segments that matches namespaced # controllers with default routes like :controller/:action/:id(.:format), e.g: # GET /admin/products/show/1 # => { controller: 'admin/products', action: 'show', id: '1' } options[:controller] ||= /.+?/ end if to.respond_to? :call options else to_endpoint = split_to to controller = to_endpoint[0] || default_controller action = to_endpoint[1] || default_action controller = add_controller_module(controller, modyoule) options.merge! check_controller_and_action(path_params, controller, action) end end def split_constraints(path_params, constraints) constraints.partition do |key, requirement| path_params.include?(key) || key == :controller end end def normalize_format(formatted) case formatted when true { requirements: { format: /.+/ }, defaults: {} } when Regexp { requirements: { format: formatted }, defaults: { format: nil } } when String { requirements: { format: Regexp.compile(formatted) }, defaults: { format: formatted } } else { requirements: { }, defaults: { } } end end def verify_regexp_requirements(requirements) requirements.each do |requirement| if requirement.source =~ ANCHOR_CHARACTERS_REGEX raise ArgumentError, "Regexp anchor characters are not allowed in routing requirements: #{requirement.inspect}" end if requirement.multiline? raise ArgumentError, "Regexp multiline option is not allowed in routing requirements: #{requirement.inspect}" end end end def normalize_defaults(options) Hash[options.reject { |_, default| Regexp === default }] end def app(blocks) if to.is_a?(Class) && to < ActionController::Metal Routing::RouteSet::StaticDispatcher.new to else if to.respond_to?(:call) Constraints.new(to, blocks, Constraints::CALL) elsif blocks.any? Constraints.new(dispatcher(defaults.key?(:controller)), blocks, Constraints::SERVE) else dispatcher(defaults.key?(:controller)) end end end def check_controller_and_action(path_params, controller, action) hash = check_part(:controller, controller, path_params, {}) do |part| translate_controller(part) { message = "'#{part}' is not a supported controller name. This can lead to potential routing problems." message << " See http://guides.rubyonrails.org/routing.html#specifying-a-controller-to-use" raise ArgumentError, message } end check_part(:action, action, path_params, hash) { |part| part.is_a?(Regexp) ? part : part.to_s } end def check_part(name, part, path_params, hash) if part hash[name] = yield(part) else unless path_params.include?(name) message = "Missing :#{name} key on routes definition, please check your routes." raise ArgumentError, message end end hash end def split_to(to) if to =~ /#/ to.split('#') else [] end end def add_controller_module(controller, modyoule) if modyoule && !controller.is_a?(Regexp) if controller =~ %r{\A/} controller[1..-1] else [modyoule, controller].compact.join("/") end else controller end end def translate_controller(controller) return controller if Regexp === controller return controller.to_s if controller =~ /\A[a-z_0-9][a-z_0-9\/]*\z/ yield end def blocks(callable_constraint) unless callable_constraint.respond_to?(:call) || callable_constraint.respond_to?(:matches?) raise ArgumentError, "Invalid constraint: #{callable_constraint.inspect} must respond to :call or :matches?" end [callable_constraint] end def constraints(options, path_params) options.group_by do |key, option| if Regexp === option :constraints else if path_params.include?(key) :path_params else :required_defaults end end end end def dispatcher(raise_on_name_error) Routing::RouteSet::Dispatcher.new raise_on_name_error end end # Invokes Journey::Router::Utils.normalize_path and ensure that # (:locale) becomes (/:locale) instead of /(:locale). Except # for root cases, where the latter is the correct one. def self.normalize_path(path) path = Journey::Router::Utils.normalize_path(path) path.gsub!(%r{/(\(+)/?}, '\1/') unless path =~ %r{^/\(+[^)]+\)$} path end def self.normalize_name(name) normalize_path(name)[1..-1].tr("/", "_") end module Base # You can specify what Rails should route "/" to with the root method: # # root to: 'pages#main' # # For options, see +match+, as +root+ uses it internally. # # You can also pass a string which will expand # # root 'pages#main' # # You should put the root route at the top of config/routes.rb, # because this means it will be matched first. As this is the most popular route # of most Rails applications, this is beneficial. def root(options = {}) match '/', { :as => :root, :via => :get }.merge!(options) end # Matches a url pattern to one or more routes. # # You should not use the +match+ method in your router # without specifying an HTTP method. # # If you want to expose your action to both GET and POST, use: # # # sets :controller, :action and :id in params # match ':controller/:action/:id', via: [:get, :post] # # Note that +:controller+, +:action+ and +:id+ are interpreted as url # query parameters and thus available through +params+ in an action. # # If you want to expose your action to GET, use +get+ in the router: # # Instead of: # # match ":controller/:action/:id" # # Do: # # get ":controller/:action/:id" # # Two of these symbols are special, +:controller+ maps to the controller # and +:action+ to the controller's action. A pattern can also map # wildcard segments (globs) to params: # # get 'songs/*category/:title', to: 'songs#show' # # # 'songs/rock/classic/stairway-to-heaven' sets # # params[:category] = 'rock/classic' # # params[:title] = 'stairway-to-heaven' # # To match a wildcard parameter, it must have a name assigned to it. # Without a variable name to attach the glob parameter to, the route # can't be parsed. # # When a pattern points to an internal route, the route's +:action+ and # +:controller+ should be set in options or hash shorthand. Examples: # # match 'photos/:id' => 'photos#show', via: :get # match 'photos/:id', to: 'photos#show', via: :get # match 'photos/:id', controller: 'photos', action: 'show', via: :get # # A pattern can also point to a +Rack+ endpoint i.e. anything that # responds to +call+: # # match 'photos/:id', to: -> (hash) { [200, {}, ["Coming soon"]] }, via: :get # match 'photos/:id', to: PhotoRackApp, via: :get # # Yes, controller actions are just rack endpoints # match 'photos/:id', to: PhotosController.action(:show), via: :get # # Because requesting various HTTP verbs with a single action has security # implications, you must either specify the actions in # the via options or use one of the HttpHelpers[rdoc-ref:HttpHelpers] # instead +match+ # # === Options # # Any options not seen here are passed on as params with the url. # # [:controller] # The route's controller. # # [:action] # The route's action. # # [:param] # Overrides the default resource identifier +:id+ (name of the # dynamic segment used to generate the routes). # You can access that segment from your controller using # params[<:param>]. # In your router: # # resources :user, param: :name # # You can override ActiveRecord::Base#to_param of a related # model to construct an URL: # # class User < ActiveRecord::Base # def to_param # name # end # end # # user = User.find_by(name: 'Phusion') # user_path(user) # => "/users/Phusion" # # [:path] # The path prefix for the routes. # # [:module] # The namespace for :controller. # # match 'path', to: 'c#a', module: 'sekret', controller: 'posts', via: :get # # => Sekret::PostsController # # See Scoping#namespace for its scope equivalent. # # [:as] # The name used to generate routing helpers. # # [:via] # Allowed HTTP verb(s) for route. # # match 'path', to: 'c#a', via: :get # match 'path', to: 'c#a', via: [:get, :post] # match 'path', to: 'c#a', via: :all # # [:to] # Points to a +Rack+ endpoint. Can be an object that responds to # +call+ or a string representing a controller's action. # # match 'path', to: 'controller#action', via: :get # match 'path', to: -> (env) { [200, {}, ["Success!"]] }, via: :get # match 'path', to: RackApp, via: :get # # [:on] # Shorthand for wrapping routes in a specific RESTful context. Valid # values are +:member+, +:collection+, and +:new+. Only use within # resource(s) block. For example: # # resource :bar do # match 'foo', to: 'c#a', on: :member, via: [:get, :post] # end # # Is equivalent to: # # resource :bar do # member do # match 'foo', to: 'c#a', via: [:get, :post] # end # end # # [:constraints] # Constrains parameters with a hash of regular expressions # or an object that responds to matches?. In addition, constraints # other than path can also be specified with any object # that responds to === (eg. String, Array, Range, etc.). # # match 'path/:id', constraints: { id: /[A-Z]\d{5}/ }, via: :get # # match 'json_only', constraints: { format: 'json' }, via: :get # # class Whitelist # def matches?(request) request.remote_ip == '1.2.3.4' end # end # match 'path', to: 'c#a', constraints: Whitelist.new, via: :get # # See Scoping#constraints for more examples with its scope # equivalent. # # [:defaults] # Sets defaults for parameters # # # Sets params[:format] to 'jpg' by default # match 'path', to: 'c#a', defaults: { format: 'jpg' }, via: :get # # See Scoping#defaults for its scope equivalent. # # [:anchor] # Boolean to anchor a match pattern. Default is true. When set to # false, the pattern matches any request prefixed with the given path. # # # Matches any request starting with 'path' # match 'path', to: 'c#a', anchor: false, via: :get # # [:format] # Allows you to specify the default value for optional +format+ # segment or disable it by supplying +false+. def match(path, options=nil) end # Mount a Rack-based application to be used within the application. # # mount SomeRackApp, at: "some_route" # # Alternatively: # # mount(SomeRackApp => "some_route") # # For options, see +match+, as +mount+ uses it internally. # # All mounted applications come with routing helpers to access them. # These are named after the class specified, so for the above example # the helper is either +some_rack_app_path+ or +some_rack_app_url+. # To customize this helper's name, use the +:as+ option: # # mount(SomeRackApp => "some_route", as: "exciting") # # This will generate the +exciting_path+ and +exciting_url+ helpers # which can be used to navigate to this mounted app. def mount(app, options = nil) if options path = options.delete(:at) else unless Hash === app raise ArgumentError, "must be called with mount point" end options = app app, path = options.find { |k, _| k.respond_to?(:call) } options.delete(app) if app end raise "A rack application must be specified" unless path rails_app = rails_app? app options[:as] ||= app_name(app, rails_app) target_as = name_for_action(options[:as], path) options[:via] ||= :all match(path, options.merge(:to => app, :anchor => false, :format => false)) define_generate_prefix(app, target_as) if rails_app self end def default_url_options=(options) @set.default_url_options = options end alias_method :default_url_options, :default_url_options= def with_default_scope(scope, &block) scope(scope) do instance_exec(&block) end end # Query if the following named route was already defined. def has_named_route?(name) @set.named_routes.key? name end private def rails_app?(app) app.is_a?(Class) && app < Rails::Railtie end def app_name(app, rails_app) if rails_app app.railtie_name elsif app.is_a?(Class) class_name = app.name ActiveSupport::Inflector.underscore(class_name).tr("/", "_") end end def define_generate_prefix(app, name) _route = @set.named_routes.get name _routes = @set app.routes.define_mounted_helper(name) app.routes.extend Module.new { def optimize_routes_generation?; false; end define_method :find_script_name do |options| if options.key? :script_name super(options) else prefix_options = options.slice(*_route.segment_keys) # we must actually delete prefix segment keys to avoid passing them to next url_for _route.segment_keys.each { |k| options.delete(k) } _routes.url_helpers.send("#{name}_path", prefix_options) end end } end end module HttpHelpers # Define a route that only recognizes HTTP GET. # For supported arguments, see match[rdoc-ref:Base#match] # # get 'bacon', to: 'food#bacon' def get(*args, &block) map_method(:get, args, &block) end # Define a route that only recognizes HTTP POST. # For supported arguments, see match[rdoc-ref:Base#match] # # post 'bacon', to: 'food#bacon' def post(*args, &block) map_method(:post, args, &block) end # Define a route that only recognizes HTTP PATCH. # For supported arguments, see match[rdoc-ref:Base#match] # # patch 'bacon', to: 'food#bacon' def patch(*args, &block) map_method(:patch, args, &block) end # Define a route that only recognizes HTTP PUT. # For supported arguments, see match[rdoc-ref:Base#match] # # put 'bacon', to: 'food#bacon' def put(*args, &block) map_method(:put, args, &block) end # Define a route that only recognizes HTTP DELETE. # For supported arguments, see match[rdoc-ref:Base#match] # # delete 'broccoli', to: 'food#broccoli' def delete(*args, &block) map_method(:delete, args, &block) end private def map_method(method, args, &block) options = args.extract_options! options[:via] = method if options.key?(:defaults) defaults(options.delete(:defaults)) { match(*args, options, &block) } else match(*args, options, &block) end self end end # You may wish to organize groups of controllers under a namespace. # Most commonly, you might group a number of administrative controllers # under an +admin+ namespace. You would place these controllers under # the app/controllers/admin directory, and you can group them # together in your router: # # namespace "admin" do # resources :posts, :comments # end # # This will create a number of routes for each of the posts and comments # controller. For Admin::PostsController, Rails will create: # # GET /admin/posts # GET /admin/posts/new # POST /admin/posts # GET /admin/posts/1 # GET /admin/posts/1/edit # PATCH/PUT /admin/posts/1 # DELETE /admin/posts/1 # # If you want to route /posts (without the prefix /admin) to # Admin::PostsController, you could use # # scope module: "admin" do # resources :posts # end # # or, for a single case # # resources :posts, module: "admin" # # If you want to route /admin/posts to +PostsController+ # (without the Admin:: module prefix), you could use # # scope "/admin" do # resources :posts # end # # or, for a single case # # resources :posts, path: "/admin/posts" # # In each of these cases, the named routes remain the same as if you did # not use scope. In the last case, the following paths map to # +PostsController+: # # GET /admin/posts # GET /admin/posts/new # POST /admin/posts # GET /admin/posts/1 # GET /admin/posts/1/edit # PATCH/PUT /admin/posts/1 # DELETE /admin/posts/1 module Scoping # Scopes a set of routes to the given default options. # # Take the following route definition as an example: # # scope path: ":account_id", as: "account" do # resources :projects # end # # This generates helpers such as +account_projects_path+, just like +resources+ does. # The difference here being that the routes generated are like /:account_id/projects, # rather than /accounts/:account_id/projects. # # === Options # # Takes same options as Base#match and Resources#resources. # # # route /posts (without the prefix /admin) to Admin::PostsController # scope module: "admin" do # resources :posts # end # # # prefix the posts resource's requests with '/admin' # scope path: "/admin" do # resources :posts # end # # # prefix the routing helper name: +sekret_posts_path+ instead of +posts_path+ # scope as: "sekret" do # resources :posts # end def scope(*args) options = args.extract_options!.dup scope = {} options[:path] = args.flatten.join('/') if args.any? options[:constraints] ||= {} unless nested_scope? options[:shallow_path] ||= options[:path] if options.key?(:path) options[:shallow_prefix] ||= options[:as] if options.key?(:as) end if options[:constraints].is_a?(Hash) defaults = options[:constraints].select do |k, v| URL_OPTIONS.include?(k) && (v.is_a?(String) || v.is_a?(Fixnum)) end (options[:defaults] ||= {}).reverse_merge!(defaults) else block, options[:constraints] = options[:constraints], {} end if options.key?(:only) || options.key?(:except) scope[:action_options] = { only: options.delete(:only), except: options.delete(:except) } end if options.key? :anchor raise ArgumentError, 'anchor is ignored unless passed to `match`' end @scope.options.each do |option| if option == :blocks value = block elsif option == :options value = options else value = options.delete(option) { POISON } end unless POISON == value scope[option] = send("merge_#{option}_scope", @scope[option], value) end end @scope = @scope.new scope yield self ensure @scope = @scope.parent end POISON = Object.new # :nodoc: # Scopes routes to a specific controller # # controller "food" do # match "bacon", action: :bacon, via: :get # end def controller(controller) @scope = @scope.new(controller: controller) yield ensure @scope = @scope.parent end # Scopes routes to a specific namespace. For example: # # namespace :admin do # resources :posts # end # # This generates the following routes: # # admin_posts GET /admin/posts(.:format) admin/posts#index # admin_posts POST /admin/posts(.:format) admin/posts#create # new_admin_post GET /admin/posts/new(.:format) admin/posts#new # edit_admin_post GET /admin/posts/:id/edit(.:format) admin/posts#edit # admin_post GET /admin/posts/:id(.:format) admin/posts#show # admin_post PATCH/PUT /admin/posts/:id(.:format) admin/posts#update # admin_post DELETE /admin/posts/:id(.:format) admin/posts#destroy # # === Options # # The +:path+, +:as+, +:module+, +:shallow_path+ and +:shallow_prefix+ # options all default to the name of the namespace. # # For options, see Base#match. For +:shallow_path+ option, see # Resources#resources. # # # accessible through /sekret/posts rather than /admin/posts # namespace :admin, path: "sekret" do # resources :posts # end # # # maps to Sekret::PostsController rather than Admin::PostsController # namespace :admin, module: "sekret" do # resources :posts # end # # # generates +sekret_posts_path+ rather than +admin_posts_path+ # namespace :admin, as: "sekret" do # resources :posts # end def namespace(path, options = {}) path = path.to_s defaults = { module: path, as: options.fetch(:as, path), shallow_path: options.fetch(:path, path), shallow_prefix: options.fetch(:as, path) } path_scope(options.delete(:path) { path }) do scope(defaults.merge!(options)) { yield } end end # === Parameter Restriction # Allows you to constrain the nested routes based on a set of rules. # For instance, in order to change the routes to allow for a dot character in the +id+ parameter: # # constraints(id: /\d+\.\d+/) do # resources :posts # end # # Now routes such as +/posts/1+ will no longer be valid, but +/posts/1.1+ will be. # The +id+ parameter must match the constraint passed in for this example. # # You may use this to also restrict other parameters: # # resources :posts do # constraints(post_id: /\d+\.\d+/) do # resources :comments # end # end # # === Restricting based on IP # # Routes can also be constrained to an IP or a certain range of IP addresses: # # constraints(ip: /192\.168\.\d+\.\d+/) do # resources :posts # end # # Any user connecting from the 192.168.* range will be able to see this resource, # where as any user connecting outside of this range will be told there is no such route. # # === Dynamic request matching # # Requests to routes can be constrained based on specific criteria: # # constraints(-> (req) { req.env["HTTP_USER_AGENT"] =~ /iPhone/ }) do # resources :iphones # end # # You are able to move this logic out into a class if it is too complex for routes. # This class must have a +matches?+ method defined on it which either returns +true+ # if the user should be given access to that route, or +false+ if the user should not. # # class Iphone # def self.matches?(request) # request.env["HTTP_USER_AGENT"] =~ /iPhone/ # end # end # # An expected place for this code would be +lib/constraints+. # # This class is then used like this: # # constraints(Iphone) do # resources :iphones # end def constraints(constraints = {}) scope(:constraints => constraints) { yield } end # Allows you to set default parameters for a route, such as this: # defaults id: 'home' do # match 'scoped_pages/(:id)', to: 'pages#show' # end # Using this, the +:id+ parameter here will default to 'home'. def defaults(defaults = {}) @scope = @scope.new(defaults: merge_defaults_scope(@scope[:defaults], defaults)) yield ensure @scope = @scope.parent end private def merge_path_scope(parent, child) #:nodoc: Mapper.normalize_path("#{parent}/#{child}") end def merge_shallow_path_scope(parent, child) #:nodoc: Mapper.normalize_path("#{parent}/#{child}") end def merge_as_scope(parent, child) #:nodoc: parent ? "#{parent}_#{child}" : child end def merge_shallow_prefix_scope(parent, child) #:nodoc: parent ? "#{parent}_#{child}" : child end def merge_module_scope(parent, child) #:nodoc: parent ? "#{parent}/#{child}" : child end def merge_controller_scope(parent, child) #:nodoc: child end def merge_action_scope(parent, child) #:nodoc: child end def merge_via_scope(parent, child) #:nodoc: child end def merge_format_scope(parent, child) #:nodoc: child end def merge_path_names_scope(parent, child) #:nodoc: merge_options_scope(parent, child) end def merge_constraints_scope(parent, child) #:nodoc: merge_options_scope(parent, child) end def merge_defaults_scope(parent, child) #:nodoc: merge_options_scope(parent, child) end def merge_blocks_scope(parent, child) #:nodoc: merged = parent ? parent.dup : [] merged << child if child merged end def merge_options_scope(parent, child) #:nodoc: (parent || {}).merge(child) end def merge_shallow_scope(parent, child) #:nodoc: child ? true : false end end # Resource routing allows you to quickly declare all of the common routes # for a given resourceful controller. Instead of declaring separate routes # for your +index+, +show+, +new+, +edit+, +create+, +update+ and +destroy+ # actions, a resourceful route declares them in a single line of code: # # resources :photos # # Sometimes, you have a resource that clients always look up without # referencing an ID. A common example, /profile always shows the profile of # the currently logged in user. In this case, you can use a singular resource # to map /profile (rather than /profile/:id) to the show action. # # resource :profile # # It's common to have resources that are logically children of other # resources: # # resources :magazines do # resources :ads # end # # You may wish to organize groups of controllers under a namespace. Most # commonly, you might group a number of administrative controllers under # an +admin+ namespace. You would place these controllers under the # app/controllers/admin directory, and you can group them together # in your router: # # namespace "admin" do # resources :posts, :comments # end # # By default the +:id+ parameter doesn't accept dots. If you need to # use dots as part of the +:id+ parameter add a constraint which # overrides this restriction, e.g: # # resources :articles, id: /[^\/]+/ # # This allows any character other than a slash as part of your +:id+. # module Resources # CANONICAL_ACTIONS holds all actions that does not need a prefix or # a path appended since they fit properly in their scope level. VALID_ON_OPTIONS = [:new, :collection, :member] RESOURCE_OPTIONS = [:as, :controller, :path, :only, :except, :param, :concerns] CANONICAL_ACTIONS = %w(index create new show update destroy) class Resource #:nodoc: attr_reader :controller, :path, :param def initialize(entities, api_only, shallow, options = {}) @name = entities.to_s @path = (options[:path] || @name).to_s @controller = (options[:controller] || @name).to_s @as = options[:as] @param = (options[:param] || :id).to_sym @options = options @shallow = shallow @api_only = api_only @only = options.delete :only @except = options.delete :except end def default_actions if @api_only [:index, :create, :show, :update, :destroy] else [:index, :create, :new, :show, :update, :destroy, :edit] end end def actions if @only Array(@only).map(&:to_sym) elsif @except default_actions - Array(@except).map(&:to_sym) else default_actions end end def name @as || @name end def plural @plural ||= name.to_s end def singular @singular ||= name.to_s.singularize end alias :member_name :singular # Checks for uncountable plurals, and appends "_index" if the plural # and singular form are the same. def collection_name singular == plural ? "#{plural}_index" : plural end def resource_scope controller end alias :collection_scope :path def member_scope "#{path}/:#{param}" end alias :shallow_scope :member_scope def new_scope(new_path) "#{path}/#{new_path}" end def nested_param :"#{singular}_#{param}" end def nested_scope "#{path}/:#{nested_param}" end def shallow? @shallow end def singleton?; false; end end class SingletonResource < Resource #:nodoc: def initialize(entities, api_only, shallow, options) super @as = nil @controller = (options[:controller] || plural).to_s @as = options[:as] end def default_actions if @api_only [:show, :create, :update, :destroy] else [:show, :create, :update, :destroy, :new, :edit] end end def plural @plural ||= name.to_s.pluralize end def singular @singular ||= name.to_s end alias :member_name :singular alias :collection_name :singular alias :member_scope :path alias :nested_scope :path def singleton?; true; end end def resources_path_names(options) @scope[:path_names].merge!(options) end # Sometimes, you have a resource that clients always look up without # referencing an ID. A common example, /profile always shows the # profile of the currently logged in user. In this case, you can use # a singular resource to map /profile (rather than /profile/:id) to # the show action: # # resource :profile # # creates six different routes in your application, all mapping to # the +Profiles+ controller (note that the controller is named after # the plural): # # GET /profile/new # POST /profile # GET /profile # GET /profile/edit # PATCH/PUT /profile # DELETE /profile # # === Options # Takes same options as +resources+. def resource(*resources, &block) options = resources.extract_options!.dup if apply_common_behavior_for(:resource, resources, options, &block) return self end with_scope_level(:resource) do options = apply_action_options options resource_scope(SingletonResource.new(resources.pop, api_only?, @scope[:shallow], options)) do yield if block_given? concerns(options[:concerns]) if options[:concerns] collection do post :create end if parent_resource.actions.include?(:create) new do get :new end if parent_resource.actions.include?(:new) set_member_mappings_for_resource end end self end # In Rails, a resourceful route provides a mapping between HTTP verbs # and URLs and controller actions. By convention, each action also maps # to particular CRUD operations in a database. A single entry in the # routing file, such as # # resources :photos # # creates seven different routes in your application, all mapping to # the +Photos+ controller: # # GET /photos # GET /photos/new # POST /photos # GET /photos/:id # GET /photos/:id/edit # PATCH/PUT /photos/:id # DELETE /photos/:id # # Resources can also be nested infinitely by using this block syntax: # # resources :photos do # resources :comments # end # # This generates the following comments routes: # # GET /photos/:photo_id/comments # GET /photos/:photo_id/comments/new # POST /photos/:photo_id/comments # GET /photos/:photo_id/comments/:id # GET /photos/:photo_id/comments/:id/edit # PATCH/PUT /photos/:photo_id/comments/:id # DELETE /photos/:photo_id/comments/:id # # === Options # Takes same options as Base#match as well as: # # [:path_names] # Allows you to change the segment component of the +edit+ and +new+ actions. # Actions not specified are not changed. # # resources :posts, path_names: { new: "brand_new" } # # The above example will now change /posts/new to /posts/brand_new # # [:path] # Allows you to change the path prefix for the resource. # # resources :posts, path: 'postings' # # The resource and all segments will now route to /postings instead of /posts # # [:only] # Only generate routes for the given actions. # # resources :cows, only: :show # resources :cows, only: [:show, :index] # # [:except] # Generate all routes except for the given actions. # # resources :cows, except: :show # resources :cows, except: [:show, :index] # # [:shallow] # Generates shallow routes for nested resource(s). When placed on a parent resource, # generates shallow routes for all nested resources. # # resources :posts, shallow: true do # resources :comments # end # # Is the same as: # # resources :posts do # resources :comments, except: [:show, :edit, :update, :destroy] # end # resources :comments, only: [:show, :edit, :update, :destroy] # # This allows URLs for resources that otherwise would be deeply nested such # as a comment on a blog post like /posts/a-long-permalink/comments/1234 # to be shortened to just /comments/1234. # # [:shallow_path] # Prefixes nested shallow routes with the specified path. # # scope shallow_path: "sekret" do # resources :posts do # resources :comments, shallow: true # end # end # # The +comments+ resource here will have the following routes generated for it: # # post_comments GET /posts/:post_id/comments(.:format) # post_comments POST /posts/:post_id/comments(.:format) # new_post_comment GET /posts/:post_id/comments/new(.:format) # edit_comment GET /sekret/comments/:id/edit(.:format) # comment GET /sekret/comments/:id(.:format) # comment PATCH/PUT /sekret/comments/:id(.:format) # comment DELETE /sekret/comments/:id(.:format) # # [:shallow_prefix] # Prefixes nested shallow route names with specified prefix. # # scope shallow_prefix: "sekret" do # resources :posts do # resources :comments, shallow: true # end # end # # The +comments+ resource here will have the following routes generated for it: # # post_comments GET /posts/:post_id/comments(.:format) # post_comments POST /posts/:post_id/comments(.:format) # new_post_comment GET /posts/:post_id/comments/new(.:format) # edit_sekret_comment GET /comments/:id/edit(.:format) # sekret_comment GET /comments/:id(.:format) # sekret_comment PATCH/PUT /comments/:id(.:format) # sekret_comment DELETE /comments/:id(.:format) # # [:format] # Allows you to specify the default value for optional +format+ # segment or disable it by supplying +false+. # # === Examples # # # routes call Admin::PostsController # resources :posts, module: "admin" # # # resource actions are at /admin/posts. # resources :posts, path: "admin/posts" def resources(*resources, &block) options = resources.extract_options!.dup if apply_common_behavior_for(:resources, resources, options, &block) return self end with_scope_level(:resources) do options = apply_action_options options resource_scope(Resource.new(resources.pop, api_only?, @scope[:shallow], options)) do yield if block_given? concerns(options[:concerns]) if options[:concerns] collection do get :index if parent_resource.actions.include?(:index) post :create if parent_resource.actions.include?(:create) end new do get :new end if parent_resource.actions.include?(:new) set_member_mappings_for_resource end end self end # To add a route to the collection: # # resources :photos do # collection do # get 'search' # end # end # # This will enable Rails to recognize paths such as /photos/search # with GET, and route to the search action of +PhotosController+. It will also # create the search_photos_url and search_photos_path # route helpers. def collection unless resource_scope? raise ArgumentError, "can't use collection outside resource(s) scope" end with_scope_level(:collection) do path_scope(parent_resource.collection_scope) do yield end end end # To add a member route, add a member block into the resource block: # # resources :photos do # member do # get 'preview' # end # end # # This will recognize /photos/1/preview with GET, and route to the # preview action of +PhotosController+. It will also create the # preview_photo_url and preview_photo_path helpers. def member unless resource_scope? raise ArgumentError, "can't use member outside resource(s) scope" end with_scope_level(:member) do if shallow? shallow_scope { path_scope(parent_resource.member_scope) { yield } } else path_scope(parent_resource.member_scope) { yield } end end end def new unless resource_scope? raise ArgumentError, "can't use new outside resource(s) scope" end with_scope_level(:new) do path_scope(parent_resource.new_scope(action_path(:new))) do yield end end end def nested unless resource_scope? raise ArgumentError, "can't use nested outside resource(s) scope" end with_scope_level(:nested) do if shallow? && shallow_nesting_depth >= 1 shallow_scope do path_scope(parent_resource.nested_scope) do scope(nested_options) { yield } end end else path_scope(parent_resource.nested_scope) do scope(nested_options) { yield } end end end end # See ActionDispatch::Routing::Mapper::Scoping#namespace def namespace(path, options = {}) if resource_scope? nested { super } else super end end def shallow @scope = @scope.new(shallow: true) yield ensure @scope = @scope.parent end def shallow? !parent_resource.singleton? && @scope[:shallow] end # Matches a url pattern to one or more routes. # For more information, see match[rdoc-ref:Base#match]. # # match 'path' => 'controller#action', via: patch # match 'path', to: 'controller#action', via: :post # match 'path', 'otherpath', on: :member, via: :get def match(path, *rest) if rest.empty? && Hash === path options = path path, to = options.find { |name, _value| name.is_a?(String) } case to when Symbol options[:action] = to when String if to =~ /#/ options[:to] = to else options[:controller] = to end else options[:to] = to end options.delete(path) paths = [path] else options = rest.pop || {} paths = [path] + rest end if options[:on] && !VALID_ON_OPTIONS.include?(options[:on]) raise ArgumentError, "Unknown scope #{on.inspect} given to :on" end if @scope[:controller] && @scope[:action] options[:to] ||= "#{@scope[:controller]}##{@scope[:action]}" end controller = options.delete(:controller) || @scope[:controller] option_path = options.delete :path to = options.delete :to via = Mapping.check_via Array(options.delete(:via) { @scope[:via] }) formatted = options.delete(:format) { @scope[:format] } anchor = options.delete(:anchor) { true } options_constraints = options.delete(:constraints) || {} path_types = paths.group_by(&:class) path_types.fetch(String, []).each do |_path| route_options = options.dup if _path && option_path ActiveSupport::Deprecation.warn <<-eowarn Specifying strings for both :path and the route path is deprecated. Change things like this: match #{_path.inspect}, :path => #{option_path.inspect} to this: match #{option_path.inspect}, :as => #{_path.inspect}, :action => #{path.inspect} eowarn route_options[:action] = _path route_options[:as] = _path _path = option_path end to = get_to_from_path(_path, to, route_options[:action]) decomposed_match(_path, controller, route_options, _path, to, via, formatted, anchor, options_constraints) end path_types.fetch(Symbol, []).each do |action| route_options = options.dup decomposed_match(action, controller, route_options, option_path, to, via, formatted, anchor, options_constraints) end self end def get_to_from_path(path, to, action) return to if to || action path_without_format = path.sub(/\(\.:format\)$/, '') if using_match_shorthand?(path_without_format) path_without_format.gsub(%r{^/}, "").sub(%r{/([^/]*)$}, '#\1').tr("-", "_") else nil end end def using_match_shorthand?(path) path =~ %r{^/?[-\w]+/[-\w/]+$} end def decomposed_match(path, controller, options, _path, to, via, formatted, anchor, options_constraints) # :nodoc: if on = options.delete(:on) send(on) { decomposed_match(path, controller, options, _path, to, via, formatted, anchor, options_constraints) } else case @scope.scope_level when :resources nested { decomposed_match(path, controller, options, _path, to, via, formatted, anchor, options_constraints) } when :resource member { decomposed_match(path, controller, options, _path, to, via, formatted, anchor, options_constraints) } else add_route(path, controller, options, _path, to, via, formatted, anchor, options_constraints) end end end def add_route(action, controller, options, _path, to, via, formatted, anchor, options_constraints) # :nodoc: path = path_for_action(action, _path) raise ArgumentError, "path is required" if path.blank? action = action.to_s default_action = options.delete(:action) || @scope[:action] if action =~ /^[\w\-\/]+$/ default_action ||= action.tr('-', '_') unless action.include?("/") else action = nil end as = if !options.fetch(:as, true) # if it's set to nil or false options.delete(:as) else name_for_action(options.delete(:as), action) end path = Mapping.normalize_path URI.parser.escape(path), formatted ast = Journey::Parser.parse path mapping = Mapping.build(@scope, @set, ast, controller, default_action, to, via, formatted, options_constraints, anchor, options) @set.add_route(mapping, ast, as, anchor) end def root(path, options={}) if path.is_a?(String) options[:to] = path elsif path.is_a?(Hash) and options.empty? options = path else raise ArgumentError, "must be called with a path and/or options" end if @scope.resources? with_scope_level(:root) do path_scope(parent_resource.path) do super(options) end end else super(options) end end protected def parent_resource #:nodoc: @scope[:scope_level_resource] end def apply_common_behavior_for(method, resources, options, &block) #:nodoc: if resources.length > 1 resources.each { |r| send(method, r, options, &block) } return true end if options.delete(:shallow) shallow do send(method, resources.pop, options, &block) end return true end if resource_scope? nested { send(method, resources.pop, options, &block) } return true end options.keys.each do |k| (options[:constraints] ||= {})[k] = options.delete(k) if options[k].is_a?(Regexp) end scope_options = options.slice!(*RESOURCE_OPTIONS) unless scope_options.empty? scope(scope_options) do send(method, resources.pop, options, &block) end return true end false end def apply_action_options(options) # :nodoc: return options if action_options? options options.merge scope_action_options end def action_options?(options) #:nodoc: options[:only] || options[:except] end def scope_action_options #:nodoc: @scope[:action_options] || {} end def resource_scope? #:nodoc: @scope.resource_scope? end def resource_method_scope? #:nodoc: @scope.resource_method_scope? end def nested_scope? #:nodoc: @scope.nested? end def with_scope_level(kind) @scope = @scope.new_level(kind) yield ensure @scope = @scope.parent end def resource_scope(resource) #:nodoc: @scope = @scope.new(:scope_level_resource => resource) controller(resource.resource_scope) { yield } ensure @scope = @scope.parent end def nested_options #:nodoc: options = { :as => parent_resource.member_name } options[:constraints] = { parent_resource.nested_param => param_constraint } if param_constraint? options end def shallow_nesting_depth #:nodoc: @scope.find_all { |node| node.frame[:scope_level_resource] }.count { |node| node.frame[:scope_level_resource].shallow? } end def param_constraint? #:nodoc: @scope[:constraints] && @scope[:constraints][parent_resource.param].is_a?(Regexp) end def param_constraint #:nodoc: @scope[:constraints][parent_resource.param] end def canonical_action?(action) #:nodoc: resource_method_scope? && CANONICAL_ACTIONS.include?(action.to_s) end def shallow_scope #:nodoc: scope = { :as => @scope[:shallow_prefix], :path => @scope[:shallow_path] } @scope = @scope.new scope yield ensure @scope = @scope.parent end def path_for_action(action, path) #:nodoc: return "#{@scope[:path]}/#{path}" if path if canonical_action?(action) @scope[:path].to_s else "#{@scope[:path]}/#{action_path(action)}" end end def action_path(name) #:nodoc: @scope[:path_names][name.to_sym] || name end def prefix_name_for_action(as, action) #:nodoc: if as prefix = as elsif !canonical_action?(action) prefix = action end if prefix && prefix != '/' && !prefix.empty? Mapper.normalize_name prefix.to_s.tr('-', '_') end end def name_for_action(as, action) #:nodoc: prefix = prefix_name_for_action(as, action) name_prefix = @scope[:as] if parent_resource return nil unless as || action collection_name = parent_resource.collection_name member_name = parent_resource.member_name end action_name = @scope.action_name(name_prefix, prefix, collection_name, member_name) candidate = action_name.select(&:present?).join('_') unless candidate.empty? # If a name was not explicitly given, we check if it is valid # and return nil in case it isn't. Otherwise, we pass the invalid name # forward so the underlying router engine treats it and raises an exception. if as.nil? candidate unless candidate !~ /\A[_a-z]/i || @set.named_routes.key?(candidate) else candidate end end end def set_member_mappings_for_resource member do get :edit if parent_resource.actions.include?(:edit) get :show if parent_resource.actions.include?(:show) if parent_resource.actions.include?(:update) patch :update put :update end delete :destroy if parent_resource.actions.include?(:destroy) end end def api_only? @set.api_only? end private def path_scope(path) @scope = @scope.new(path: merge_path_scope(@scope[:path], path)) yield ensure @scope = @scope.parent end end # Routing Concerns allow you to declare common routes that can be reused # inside others resources and routes. # # concern :commentable do # resources :comments # end # # concern :image_attachable do # resources :images, only: :index # end # # These concerns are used in Resources routing: # # resources :messages, concerns: [:commentable, :image_attachable] # # or in a scope or namespace: # # namespace :posts do # concerns :commentable # end module Concerns # Define a routing concern using a name. # # Concerns may be defined inline, using a block, or handled by # another object, by passing that object as the second parameter. # # The concern object, if supplied, should respond to call, # which will receive two parameters: # # * The current mapper # * A hash of options which the concern object may use # # Options may also be used by concerns defined in a block by accepting # a block parameter. So, using a block, you might do something as # simple as limit the actions available on certain resources, passing # standard resource options through the concern: # # concern :commentable do |options| # resources :comments, options # end # # resources :posts, concerns: :commentable # resources :archived_posts do # # Don't allow comments on archived posts # concerns :commentable, only: [:index, :show] # end # # Or, using a callable object, you might implement something more # specific to your application, which would be out of place in your # routes file. # # # purchasable.rb # class Purchasable # def initialize(defaults = {}) # @defaults = defaults # end # # def call(mapper, options = {}) # options = @defaults.merge(options) # mapper.resources :purchases # mapper.resources :receipts # mapper.resources :returns if options[:returnable] # end # end # # # routes.rb # concern :purchasable, Purchasable.new(returnable: true) # # resources :toys, concerns: :purchasable # resources :electronics, concerns: :purchasable # resources :pets do # concerns :purchasable, returnable: false # end # # Any routing helpers can be used inside a concern. If using a # callable, they're accessible from the Mapper that's passed to # call. def concern(name, callable = nil, &block) callable ||= lambda { |mapper, options| mapper.instance_exec(options, &block) } @concerns[name] = callable end # Use the named concerns # # resources :posts do # concerns :commentable # end # # concerns also work in any routes helper that you want to use: # # namespace :posts do # concerns :commentable # end def concerns(*args) options = args.extract_options! args.flatten.each do |name| if concern = @concerns[name] concern.call(self, options) else raise ArgumentError, "No concern named #{name} was found!" end end end end class Scope # :nodoc: OPTIONS = [:path, :shallow_path, :as, :shallow_prefix, :module, :controller, :action, :path_names, :constraints, :shallow, :blocks, :defaults, :via, :format, :options] RESOURCE_SCOPES = [:resource, :resources] RESOURCE_METHOD_SCOPES = [:collection, :member, :new] attr_reader :parent, :scope_level def initialize(hash, parent = NULL, scope_level = nil) @hash = hash @parent = parent @scope_level = scope_level end def nested? scope_level == :nested end def resources? scope_level == :resources end def resource_method_scope? RESOURCE_METHOD_SCOPES.include? scope_level end def action_name(name_prefix, prefix, collection_name, member_name) case scope_level when :nested [name_prefix, prefix] when :collection [prefix, name_prefix, collection_name] when :new [prefix, :new, name_prefix, member_name] when :member [prefix, name_prefix, member_name] when :root [name_prefix, collection_name, prefix] else [name_prefix, member_name, prefix] end end def resource_scope? RESOURCE_SCOPES.include? scope_level end def options OPTIONS end def new(hash) self.class.new hash, self, scope_level end def new_level(level) self.class.new(frame, self, level) end def [](key) scope = find { |node| node.frame.key? key } scope && scope.frame[key] end include Enumerable def each node = self loop do break if node.equal? NULL yield node node = node.parent end end def frame; @hash; end NULL = Scope.new(nil, nil) end def initialize(set) #:nodoc: @set = set @scope = Scope.new({ :path_names => @set.resources_path_names }) @concerns = {} end include Base include HttpHelpers include Redirection include Scoping include Concerns include Resources end end end